PT-2026-47344 · Openbullet · Openbullet2

Maksim Rogov + 1 · Published 2026-06-08 · Updated 2026-06-08 · CVE-2026-39908

NVD

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

OpenBullet2 through version 0.3.2 on Windows contains a credential disclosure vulnerability that allows remote attackers to capture the NTLMv2 hash of the process user by configuring a job proxy source with a UNC path pointing to an attacker-controlled server. When the job starts, the application attempts to load proxies from the UNC path, triggering an SMB authentication attempt that discloses the NTLMv2 hash, which can then be relayed or cracked offline.

Exploit

Fix

Insufficiently Protected Credentials

Weakness Enumeration

CWE-522

Related Identifiers

CVE-2026-39908

Affected Products

Openbullet2

References · 3

• 🔥 https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-39908 · Security Note
• https://vulncheck.com/advisories/openbullet2-ntlmv2-hash-disclosure-via-unc-path-proxy-source · Note